importnerd Posted November 28, 2016 Share Posted November 28, 2016 Hello all, I have a 1990 LS400 with what seems to be the notorious no start issue. We have spent a couple of hours pulling our hair out so far. The car will crank with no issue but it will not fire. We have checked the following Igniters are both working Spark plug wires are all sending spark Spark plugs are good Fuel pump is turning on We are getting fuel to the fuel rails The car is in time The trunk wiring looks good no wires look damaged The car is only pulling one code 23 which is for the air temp sensor We also tried spraying ether in the intake and it still did not start the car. We have run out of ideals and have gone through countless no start post and have tried everything suggested but have had no success. Quote Link to comment Share on other sites More sharing options...
chc0318 Posted November 28, 2016 Share Posted November 28, 2016 How many miles ? Have your ECU ECM Computer Repair before? I guess it might caused by your ECU. Quote Link to comment Share on other sites More sharing options...
Exhaustgases Posted November 30, 2016 Share Posted November 30, 2016 So you checked spark when turning it by the ignition start switch? Or you just did the igniter test like on line? I'd suspect the crank or cam sensors, and need the way to check the signal from them. Ecu x2 as well. Quote Link to comment Share on other sites More sharing options...
vissine Posted December 4, 2016 Share Posted December 4, 2016 How about check engine compression? Quote Link to comment Share on other sites More sharing options...
Exhaustgases Posted December 4, 2016 Share Posted December 4, 2016 Injectors all have a signal? If the engine was turning and had spark at all wires then t belt is still there, could jump time though. And like above c test would show that. If it had good timed spark it should have run on start fluid. Quote Link to comment Share on other sites More sharing options...
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